Virtual Machine Migration

专利名称：Virtual Machine Migration发明人：Michael NELSON申请号：US12721899申请日：20100311

公开号：US20100169537A1公开日：20100701

专利附图：

摘要：A source virtual machine (VM) hosted on a source server is migrated to adestination VM on a destination server without first powering down the source VM. Afteroptional pre-copying of the source VM's memory to the destination VM, the source VM issuspended and its non-memory state is transferred to the destination VM; the

destination VM is then resumed from the transferred state. The source VM memory iseither paged in to the destination VM on demand, or is transferred asynchronously bypre-copying and write-protecting the source VM memory, and then later transferringonly the modified pages after the destination VM is resumed. The source and destinationservers preferably share common storage, in which the source VM's virtual disk is stored;this avoids the need to transfer the virtual disk contents. Network connectivity ispreferably also made transparent to the user by arranging the servers on a commonsubnet, with virtual network connection addresses generated from a common namespace of physical addresses.

申请人：Michael NELSON

地址：Alamo CA US

国籍：US

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